diff options
Diffstat (limited to 'src/com/android/camera/data/CameraDataAdapter.java')
| -rw-r--r-- | src/com/android/camera/data/CameraDataAdapter.java | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/src/com/android/camera/data/CameraDataAdapter.java b/src/com/android/camera/data/CameraDataAdapter.java new file mode 100644 index 000000000..5d10953f8 --- /dev/null +++ b/src/com/android/camera/data/CameraDataAdapter.java @@ -0,0 +1,330 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.camera.data; + +import android.content.ContentResolver; +import android.content.Context; +import android.database.Cursor; +import android.graphics.Bitmap; +import android.graphics.BitmapFactory; +import android.graphics.Matrix; +import android.graphics.drawable.ColorDrawable; +import android.os.AsyncTask; +import android.provider.MediaStore; +import android.provider.MediaStore.Images; +import android.provider.MediaStore.Images.ImageColumns; +import android.util.Log; +import android.view.View; +import android.widget.ImageView; + +import com.android.camera.Storage; +import com.android.camera.ui.FilmStripView; + +import java.util.ArrayList; +import java.util.List; + +/** + * A FilmStripDataProvider that provide data in the camera folder. + * + * The given view for camera preview won't be added until the preview info + * has been set by setPreviewInfo(int, int, int) + */ +public class CameraDataAdapter implements FilmStripView.DataAdapter { + private static final String TAG = "CamreaFilmStripDataProvider"; + + private static final int DEFAULT_DECODE_SIZE = 3000; + private static final String ORDER_CLAUSE = ImageColumns.DATE_TAKEN + " DESC, " + + ImageColumns._ID + " DESC"; + private static final String[] CAMERA_PATH = { Storage.DIRECTORY + "%" }; + private static final int COL_ID = 0; + private static final int COL_TITLE = 1; + private static final int COL_MIME_TYPE = 2; + private static final int COL_DATE_TAKEN = 3; + private static final int COL_DATE_MODIFIED = 4; + private static final int COL_DATA = 5; + private static final int COL_ORIENTATION = 6; + private static final int COL_WIDTH = 7; + private static final int COL_HEIGHT = 8; + private static final int COL_SIZE = 9; + + private static final String[] PROJECTION = { + ImageColumns._ID, // 0, int + ImageColumns.TITLE, // 1, string + ImageColumns.MIME_TYPE, // 2, tring + ImageColumns.DATE_TAKEN, // 3, int + ImageColumns.DATE_MODIFIED, // 4, int + ImageColumns.DATA, // 5, string + ImageColumns.ORIENTATION, // 6, int, 0, 90, 180, 270 + ImageColumns.WIDTH, // 7, int + ImageColumns.HEIGHT, // 8, int + ImageColumns.SIZE // 9, int + }; + + // 32K buffer. + private static final byte[] DECODE_TEMP_STORAGE = new byte[32 * 1024]; + + private List<LocalImageData> mImages; + + private FilmStripView mFilmStripView; + private View mCameraPreviewView; + private ColorDrawable mPlaceHolder; + + private int mSuggestedWidth = DEFAULT_DECODE_SIZE; + private int mSuggestedHeight = DEFAULT_DECODE_SIZE; + + public CameraDataAdapter(View cameraPreviewView, int placeHolderColor) { + mCameraPreviewView = cameraPreviewView; + mPlaceHolder = new ColorDrawable(placeHolderColor); + } + + public void setCameraPreviewInfo(int width, int height, int orientation) { + addOrReplaceCameraData(buildCameraImageData(width, height, orientation)); + } + + @Override + public int getTotalNumber() { + return mImages.size(); + } + + @Override + public FilmStripView.ImageData getImageData(int id) { + if (id >= mImages.size()) return null; + return mImages.get(id); + } + + @Override + public void suggestSize(int w, int h) { + if (w <= 0 || h <= 0) { + mSuggestedWidth = mSuggestedHeight = DEFAULT_DECODE_SIZE; + } else { + mSuggestedWidth = (w < DEFAULT_DECODE_SIZE ? w : DEFAULT_DECODE_SIZE); + mSuggestedHeight = (h < DEFAULT_DECODE_SIZE ? h : DEFAULT_DECODE_SIZE); + } + } + + @Override + public void requestLoad(ContentResolver resolver) { + QueryTask qtask = new QueryTask(); + qtask.execute(resolver); + } + + @Override + public View getView(Context c, int dataID) { + if (dataID >= mImages.size() || dataID < 0) { + return null; + } + + LocalImageData data = mImages.get(dataID); + + if (data.isCameraData) return mCameraPreviewView; + + ImageView v = new ImageView(c); + v.setImageDrawable(mPlaceHolder); + + v.setScaleType(ImageView.ScaleType.FIT_XY); + LoadBitmapTask task = new LoadBitmapTask(data, v); + task.execute(); + return v; + } + + @Override + public void setDataListener(FilmStripView v) { + mFilmStripView = v; + } + + private LocalImageData buildCameraImageData(int width, int height, int orientation) { + LocalImageData d = new LocalImageData(); + d.width = width; + d.height = height; + d.orientation = orientation; + d.isCameraData = true; + return d; + } + + private void addOrReplaceCameraData(LocalImageData data) { + if (mImages == null) mImages = new ArrayList<LocalImageData>(); + if (mImages.size() == 0) { + mImages.add(0, data); + return; + } + + LocalImageData first = mImages.get(0); + if (first.isCameraData) { + mImages.set(0, data); + } else { + mImages.add(0, data); + } + } + + private LocalImageData buildCursorImageData(Cursor c) { + LocalImageData d = new LocalImageData(); + d.id = c.getInt(COL_ID); + d.title = c.getString(COL_TITLE); + d.mimeType = c.getString(COL_MIME_TYPE); + d.path = c.getString(COL_DATA); + d.orientation = c.getInt(COL_ORIENTATION); + d.width = c.getInt(COL_WIDTH); + d.height = c.getInt(COL_HEIGHT); + if (d.width <= 0 || d.height <= 0) { + Log.v(TAG, "warning! zero dimension for " + + d.path + ":" + d.width + "x" + d.height); + Dimension dim = decodeDimension(d.path); + if (dim != null) { + d.width = dim.width; + d.height = dim.height; + } else { + Log.v(TAG, "warning! dimension decode failed for " + d.path); + Bitmap b = BitmapFactory.decodeFile(d.path); + if (b == null) return null; + d.width = b.getWidth(); + d.height = b.getHeight(); + } + } + if (d.orientation == 90 || d.orientation == 270) { + int b = d.width; + d.width = d.height; + d.height = b; + } + return d; + } + + private Dimension decodeDimension(String path) { + BitmapFactory.Options opts = new BitmapFactory.Options(); + opts.inJustDecodeBounds = true; + Bitmap b = BitmapFactory.decodeFile(path, opts); + if (b == null) return null; + Dimension d = new Dimension(); + d.width = opts.outWidth; + d.height = opts.outHeight; + return d; + } + + private class Dimension { + public int width; + public int height; + } + + private class LocalImageData implements FilmStripView.ImageData { + public boolean isCameraData; + public int id; + public String title; + public String mimeType; + public String path; + // from MediaStore, can only be 0, 90, 180, 270; + public int orientation; + // width and height should be adjusted according to orientation. + public int width; + public int height; + + @Override + public int getWidth() { + return width; + } + + @Override + public int getHeight() { + return height; + } + + @Override + public String toString() { + return "LocalImageData:" + ",data=" + path + ",mimeType=" + mimeType + + "," + width + "x" + height + ",orientation=" + orientation; + } + } + + private class QueryTask extends AsyncTask<ContentResolver, Void, List<LocalImageData>> { + private ContentResolver mResolver; + private LocalImageData mCameraImageData; + + @Override + protected List<LocalImageData> doInBackground(ContentResolver... resolver) { + List<LocalImageData> l = null; + Cursor c = resolver[0].query(Images.Media.EXTERNAL_CONTENT_URI, PROJECTION, + MediaStore.Images.Media.DATA + " like ? ", CAMERA_PATH, + ORDER_CLAUSE); + if (c == null) return null; + l = new ArrayList<LocalImageData>(); + c.moveToFirst(); + while (!c.isLast()) { + LocalImageData data = buildCursorImageData(c); + if (data != null) l.add(data); + else Log.e(TAG, "Error decoding file:" + c.getString(COL_DATA)); + c.moveToNext(); + } + c.close(); + return l; + } + + @Override + protected void onPostExecute(List<LocalImageData> l) { + boolean changed = (l != mImages); + LocalImageData first = null; + if (mImages != null && mImages.size() > 0) { + first = mImages.get(0); + if (!first.isCameraData) first = null; + } + mImages = l; + if (first != null) addOrReplaceCameraData(first); + // both might be null. + if (changed) mFilmStripView.onDataChanged(); + } + } + + private class LoadBitmapTask extends AsyncTask<Void, Void, Bitmap> { + private LocalImageData mData; + private ImageView mView; + + public LoadBitmapTask( + LocalImageData d, ImageView v) { + mData = d; + mView = v; + } + + @Override + protected Bitmap doInBackground(Void... v) { + BitmapFactory.Options opts = null; + Bitmap b; + int sample = 1; + while (mSuggestedWidth * sample < mData.width + || mSuggestedHeight * sample < mData.height) { + sample *= 2; + } + opts = new BitmapFactory.Options(); + opts.inSampleSize = sample; + opts.inTempStorage = DECODE_TEMP_STORAGE; + if (isCancelled()) return null; + b = BitmapFactory.decodeFile(mData.path, opts); + if (mData.orientation != 0) { + if (isCancelled()) return null; + Matrix m = new Matrix(); + m.setRotate((float) mData.orientation); + b = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), m, false); + } + return b; + } + + @Override + protected void onPostExecute(Bitmap bitmap) { + if (bitmap == null) { + Log.e(TAG, "Cannot decode bitmap file:" + mData.path); + return; + } + mView.setImageBitmap(bitmap); + } + } +} |